package org.example.netty.http;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.*;
import io.netty.util.CharsetUtil;

import java.net.URI;

/**
 * 读取客户端数据
 * 客户端与服务器相互通信的数据是封装成HttpObject
 */
@ChannelHandler.Sharable
public class TestServerHandler extends SimpleChannelInboundHandler<HttpObject> {
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Exception {
        //判断msg是不是httprequest请求
        if (msg instanceof HttpRequest) {
            System.out.println("");
            System.out.println("msg 类型=" + msg.getClass());
            System.out.println("客户端地址" + ctx.channel().remoteAddress());

            HttpRequest request = (HttpRequest) msg;
            URI uri = new URI(request.uri());
            System.out.println(uri);
            if ("/favicon.ico".equals(uri.getPath())) {
                /**
                 * firefox有请求但是没有走这里
                 * chrome才走这里
                 */
                System.out.println("请求了favicon.ico，不响应");
                return;
            }

            //回复信息给浏览器，UTF16解决乱码
            ByteBuf content = Unpooled.copiedBuffer("Hello，我是服务器", CharsetUtil.UTF_16);

            //构造一个http的响应，即httpresponse
            DefaultFullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK, content);

            response.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/plain");
            response.headers().set(HttpHeaderNames.CONTENT_LENGTH, content.readableBytes());
            ctx.writeAndFlush(response);
        }
    }
}
